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rt: more clock_nanosleep tests
Test that clock_nanosleep rejects out of range time values. Test that clock_nanosleep actually sleeps for at least the requested time relative to the requested clock. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
DJ Delorie
parent
d40ac01cbb
commit
cfb35f5f7f
@ -77,6 +77,7 @@ tests := tst-shm tst-timer tst-timer2 \
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tst-bz28213 \
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tst-timer3 tst-timer4 tst-timer5 \
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tst-cpuclock2 tst-cputimer1 tst-cputimer2 tst-cputimer3 \
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tst-clock_nanosleep2 \
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tst-shm-cancel \
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tst-mqueue10
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tests-internal := tst-timer-sigmask
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@ -84,6 +85,7 @@ tests-internal := tst-timer-sigmask
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tests-time64 := \
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tst-aio6-time64 \
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tst-cpuclock2-time64 \
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tst-clock_nanosleep2-time64 \
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tst-mqueue1-time64 \
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tst-mqueue2-time64 \
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tst-mqueue4-time64 \
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1
rt/tst-clock_nanosleep2-time64.c
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1
rt/tst-clock_nanosleep2-time64.c
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@ -0,0 +1 @@
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#include "tst-clock_nanosleep2.c"
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255
rt/tst-clock_nanosleep2.c
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255
rt/tst-clock_nanosleep2.c
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@ -0,0 +1,255 @@
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/* Test program for process CPU clocks - invalid inputs, minimum time
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Copyright (C) 2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* This test has two primary goals - first, to validate that invalid
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inputs to clock_nanosleep are caught, and second, to validate that
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clock_nanosleep sleeps for at least the amount of time requested.
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It is assumed that the system may sleep for an arbitrary additional
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amount of time beyond the requested time. */
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#include <unistd.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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#include <support/xunistd.h>
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#include <support/check.h>
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#include <support/xthread.h>
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#include <support/timespec.h>
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/* This is 1 ms per test, we have 10 tests, so this file runs in on
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the order of 0.01 seconds. */
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#define TEST_NSEC 1000000
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/* Nanoseconds per second. */
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#define NSECMAX 1000000000L
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static pthread_barrier_t barrier;
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/* This function is intended to rack up both user and system time. */
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static void *
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chew_cpu (void *arg)
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{
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pthread_barrier_wait (&barrier);
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while (1)
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{
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static volatile char buf[4096];
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for (int i = 0; i < 100; ++i)
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for (size_t j = 0; j < sizeof buf; ++j)
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buf[j] = 0xaa;
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int nullfd = xopen ("/dev/null", O_WRONLY, 0);
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for (int i = 0; i < 100; ++i)
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for (size_t j = 0; j < sizeof buf; ++j)
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buf[j] = 0xbb;
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xwrite (nullfd, (char *) buf, sizeof buf);
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close (nullfd);
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}
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return NULL;
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}
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static void
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ptime_1 (const char *n, struct timespec t)
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{
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/* This is only for debugging failed test cases. */
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printf ("%12s: %lld.%09lld\n", n, (long long int) t.tv_sec,
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(long long int) t.tv_nsec);
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}
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#define ptime(t) ptime_1 (#t, t)
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static void
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test_interval_1 (const char *n_clock, clockid_t t_clock)
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{
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struct timespec me_before, me_after, quantum, me_sleep, me_slept;
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long long int slept, min_slept;
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/* Arbitrary to ensure our time period is sufficiently bigger than
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the time step. */
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TEST_VERIFY (clock_getres (t_clock, &quantum) == 0);
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printf("Clock quantum: %lld ns, test time: %lld ns\n",
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(long long int) quantum.tv_nsec, (long long int) TEST_NSEC);
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TEST_VERIFY (quantum.tv_nsec <= TEST_NSEC / 10);
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min_slept = TEST_NSEC;
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me_sleep = make_timespec (0, min_slept);
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printf ("test clock %s for %lld.%09lld sec relative\n",
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n_clock, (long long int) me_sleep.tv_sec,
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(long long int) me_sleep.tv_nsec);
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TEST_COMPARE (clock_gettime (t_clock, &me_before), 0);
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TEST_COMPARE (clock_nanosleep (t_clock, 0, &me_sleep, NULL), 0);
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TEST_COMPARE (clock_gettime (t_clock, &me_after), 0);
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me_slept = timespec_sub (me_after, me_before);
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slept = support_timespec_ns (me_slept);
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ptime (me_before);
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ptime (me_after);
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ptime (me_sleep);
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ptime (me_slept);
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printf ("test slept %lld nsec >= asked for %lld ?\n", slept, min_slept);
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/* This is the important part - verify that the time slept is at
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least as much as the time requested. */
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TEST_VERIFY (slept >= min_slept);
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}
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static void
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test_abs_1 (const char *n_clock, clockid_t t_clock)
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{
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struct timespec me_before, me_after, quantum, me_sleep;
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/* Arbitrary to ensure our time period is sufficiently bigger than
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the time step. */
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TEST_VERIFY (clock_getres (t_clock, &quantum) == 0);
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printf("Clock quantum: %lld ns, test time: %lld ns\n",
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(long long int) quantum.tv_nsec, (long long int) TEST_NSEC);
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TEST_VERIFY (quantum.tv_nsec <= TEST_NSEC / 10);
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me_sleep = make_timespec (0, TEST_NSEC);
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printf ("test clock %s for %lld.%09lld sec absolute\n",
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n_clock, (long long int) me_sleep.tv_sec,
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(long long int) me_sleep.tv_nsec);
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TEST_COMPARE (clock_gettime (t_clock, &me_before), 0);
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me_sleep = timespec_add (me_sleep, me_before);
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TEST_COMPARE (clock_nanosleep (t_clock, TIMER_ABSTIME, &me_sleep, NULL), 0);
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TEST_COMPARE (clock_gettime (t_clock, &me_after), 0);
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ptime (me_before);
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ptime (me_sleep);
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ptime (me_after);
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printf("test slept until %lld.%09lld after requested %lld.%09lld ?\n",
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(long long int) me_after.tv_sec, (long long int) me_after.tv_nsec,
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(long long int) me_sleep.tv_sec, (long long int) me_sleep.tv_nsec);
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/* This is the important part - verify that the time slept is at
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least as much as the time requested. */
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TEST_TIMESPEC_EQUAL_OR_AFTER (me_after, me_sleep);
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}
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static void
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test_invalids_1 (const char *the_clock_name, int the_clock,
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const char *flags_name, int flags)
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{
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struct timespec me_before;
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/* Note: do not use make_timespec() in case that function tries to
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normalize the fields. */
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printf ("%s: %s: test tv 0, 0\n", the_clock_name, flags_name);
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me_before.tv_sec = 0;
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me_before.tv_nsec = 0;
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TEST_COMPARE (clock_nanosleep (the_clock, 0, &me_before, NULL), 0);
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printf ("%s: %s: test tv -1, 0\n", the_clock_name, flags_name);
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me_before.tv_sec = -1;
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me_before.tv_nsec = 0;
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TEST_COMPARE (clock_nanosleep (the_clock, 0, &me_before, NULL), EINVAL);
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printf ("%s: %s: test tv 0, -1\n", the_clock_name, flags_name);
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me_before.tv_sec = 0;
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me_before.tv_nsec = -1;
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TEST_COMPARE (clock_nanosleep (the_clock, 0, &me_before, NULL), EINVAL);
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printf ("%s: %s: test tv -1, -1\n", the_clock_name, flags_name);
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me_before.tv_sec = -1;
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me_before.tv_nsec = -1;
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TEST_COMPARE (clock_nanosleep (the_clock, 0, &me_before, NULL), EINVAL);
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printf ("%s: %s: test tv 0, MAX\n", the_clock_name, flags_name);
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me_before.tv_sec = 0;
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me_before.tv_nsec = NSECMAX;
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TEST_COMPARE (clock_nanosleep (the_clock, 0, &me_before, NULL), EINVAL);
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}
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static int
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do_test (void)
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{
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pthread_t th;
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pthread_barrier_init (&barrier, NULL, 2);
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/* Test for proper error detection. */
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#define test_invalids(c, f) test_invalids_1 (#c, c, #f, f)
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test_invalids (CLOCK_REALTIME, 0);
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#ifdef CLOCK_TAI
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test_invalids (CLOCK_TAI, 0);
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#endif
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test_invalids (CLOCK_MONOTONIC, 0);
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#ifdef CLOCK_BOOTTIME
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test_invalids (CLOCK_BOOTTIME, 0);
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#endif
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test_invalids (CLOCK_PROCESS_CPUTIME_ID, 0);
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test_invalids (CLOCK_REALTIME, TIMER_ABSTIME);
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#ifdef CLOCK_TAI
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test_invalids (CLOCK_TAI, TIMER_ABSTIME);
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#endif
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test_invalids (CLOCK_MONOTONIC, TIMER_ABSTIME);
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#ifdef CLOCK_BOOTTIME
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test_invalids (CLOCK_BOOTTIME, TIMER_ABSTIME);
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#endif
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test_invalids (CLOCK_PROCESS_CPUTIME_ID, TIMER_ABSTIME);
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/* Test for various clocks "working". */
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#define test_interval(c) test_interval_1 (#c, c)
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test_interval (CLOCK_REALTIME);
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#ifdef CLOCK_TAI
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test_interval (CLOCK_TAI);
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#endif
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test_interval (CLOCK_MONOTONIC);
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#ifdef CLOCK_BOOTTIME
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test_interval (CLOCK_BOOTTIME);
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#endif
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th = xpthread_create (NULL, chew_cpu, NULL);
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xpthread_barrier_wait (&barrier);
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test_interval (CLOCK_PROCESS_CPUTIME_ID);
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xpthread_cancel (th);
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#define test_abs(c) test_abs_1 (#c, c)
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test_abs (CLOCK_REALTIME);
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#ifdef CLOCK_TAI
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test_abs (CLOCK_TAI);
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#endif
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test_abs (CLOCK_MONOTONIC);
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#ifdef CLOCK_BOOTTIME
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test_abs (CLOCK_BOOTTIME);
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#endif
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th = xpthread_create (NULL, chew_cpu, NULL);
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xpthread_barrier_wait (&barrier);
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test_abs (CLOCK_PROCESS_CPUTIME_ID);
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xpthread_cancel (th);
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return 0;
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}
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#include <support/test-driver.c>
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